Does the 139 have completely independent fuel system for each engine like the S76
It's a requirement for all FAR 29 helos
gulli§ 29.953 Fuel system independence.
(a) For category A rotorcraft—
(1) The fuel system must meet the requirements of
§ 29.903(b); and
(2) Unless other provisions are made to meet
paragraph (a)(1) of this section, the fuel system must allow fuel to be supplied to each engine through a system independent of those parts of each system supplying fuel to other engines.
(b) Each fuel system for a multiengine category B rotorcraft must meet the requirements of
paragraph (a)(2) of this section. However, separate fuel tanks need not be provided for each engine.
§ 29.903 Engines
(b)
Category A; engine isolation. For each category A rotorcraft, the powerplants must be arranged and isolated from each other to allow operation, in at least one configuration, so that the failure or malfunction of any engine, or the failure of any system that can affect any engine, will not—
(1) Prevent the continued safe operation of the remaining engines